The "float" data type is used to represent floating point numbers. The range of values for the "float" datatype is between +/-3.4e38 to +/-3.4e38. Usually floating point numbers have decimal places.

  #include <iostream.h>
  void main()
   {
     float rad=2;
     float pi= 3.14159;
     float area=pi *rad *rad;
     cout << "Radius of the circle is:"<< rad << '\n';
     cout << "Area of the circle is:"<< area <<'\n';
   }	

In the above data type example, the value of "pi" is a floating point number. Also the the value for area of the circle is a floating point number.